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J. G. LEHMAN TEMPERATURE CONTROL OF KETTLES BY ZQNES July 31 Original Filed Spt. 27. 1919 Reissued July 31, 1923.

n STATE-S PATENT OFFICE.

JOHN GEORGE LEHMAN. OF BETHLEHEM, PENNSYLVANIA, ASSIGNOB TO BETHLEHEM FOUNDRY & MACHINE COMPANY, OF BETHLEHEM, PENNSYLVANIA, A CORPORA- TION OI PENNSYLVANIA.

TEMPERATURE CONTROL or KETTLES BY zonns.

Original No. 1,407,666, dated February 21, 1922, Serial 170. 327,007, filed September 27, 1919. Application {or reissue filed ctober 12, 1922. Serial No. 584,170.

.To all urhom it may concern: 7

Be it known that I, Join: Gnonon LEI!- MAN, a citizen of the UnitedStates, and a resident of Bethlehem, in the county of Northampton and State of Pennsylvania,

have invented certain new and useful Improvements in 'lemperature Control of Kettles by Zones, of which the following is a specification.

My invention relates to the heating or cooling of the walls of-kettles and other re-' ceptaclcs, intended for the heat-treatment of liquids, particularly in carrying. out chemical processes. v

The purpose of my. invention is to provide for different applications of heating or cooling fluid throughout diil'erent layers,

belts or zones of a kettle.

A further-purpose is to provlde for heatg0 ing one part of a liquid under treatment, at the same/time that the heat is withdrawn from another part, or that the other part thereof is cooled, so as to give differential temperatures to the several parts thereof.

2 Further purposes will appear in the specification and in the claims.

I have preferred to illustrate my mventi'on by but one general form, selecting a form which is practical, eflicient and inexpensiveand which at the sametime well illustrates the principles of my invention.

Figure 1 is a horizontal section showing one arrangement of connections for the practice of my invention.

Figure-2 is a vertical broken section-taken upon line 2-2 of Figure 1.-

Figure-3 is a brokenvertical section upon line 3+3 of Figure 1. Figure 4 is a horizontal section showing .4 a second arrangement of connections.

Figure 5 1s a broken vertical sectlon'uponv I line 5-5 in Figure 4.

4 Figure 6 is a section upon line 6-6 of- Figure 1, looking in the direction of the 5 arrows but showing the pipe alonewithout the kettle walls. I

In the drawings, similar numerals indicate likeparts. Y

In many different lines of manufacture 5 where heat-treatment of liquids is required,

it is desirable to have the heat of the liquid under completehcontrol, and my invention is I I p v u walls, shown as pipes directed to rapid, simple and effective con' trol, difierentiating between difierent layers or levels of the liquid being treated.

or preferably a continous passage within its I These several passages have'been arranged in groups or in beltsof which I show three, zit-8,9 and 10, with separate in- 7, in order that a I The container (i, generically called a kettle, is provided with a plurality of passages,

lets and outlets, if separate sections be used, as in Figures 1-3, or tapped at inter vals to provide inlets'and outlets, where the passage s continuous, as m Flgures 4 and 5.

belts have separate inlets 11, 12 and 13, each from either of two difi'erent sources of supply and each source valved at 14 to control the supply. The one general source of supply 15 is available for any of the three inlets.

The other sources, 16, 17 and 18 are separate,

thus providing for difi'erent tem eratures of heated or superheated steam, col water, etc. 1

In this form there are separate outlets also, at 19, 20 and 21, valved at 14 and connecting with a main discharge pipe 22; so that In the form shown in Figures 1-3, these.

any one of'the single belts may be heated or cooled without affecting the temperature accessible in another or others of the belts of the set. The discontinuous passages forming wholly separate and distinct piping for tho difierent belts are shown in Figure 6.

In the form shown in Figures 4 and 5 there are three general sources of fluid sup I ply, at 15', 15 and 15, each available for an of the inlets. and cut-off from them by va ves 14:, but only one outlet for the three belts in coimection with the second or middle belt and both the lower and middle belts in conjunction with the top belt, where fluid is applied. As it is desirable, almost invariably to'heat the lower part of the contents,

whether the upper part is being heated or not, the single. outlet form is ordinarily not ob'ectionable, and the additional outlets of igure 3, are not ordinarily necessary.- The general sources of supply can be necessitating the use of the lower belt, f

suited in number and character to the needs of the particular installation, with or without separate outlets.

liquid to be treated, heating or coolin fluids canbe supplied to any of the belts esired,

together or with difierent item eratures -in belts, giving great exibilit'y to eoolin fluids.

Having thus described my invention, what I claimas new and desire to secure by Let- 'ters Patent is:

1. In-a device for treating liquids, a kettle having integral side and bottom walls,

-fluid passagesin the walls, and a plurality of points 0 inlet to and outlet from the said passages, in combination with controlled fluid sup 1 for the inlets whereby fluid can be passe t rough the passages to surround 'one or more belts or zones of said kettle without passing through the other ,belt or belts thereof.

2. In adevice for treating-liquids, akettle.

having spirally arranged piping in the solid walls thereof, surrounding several belts or 'zones' of the kettle, in combination with se arate inlets, one for the iping in each of said belts or zones passing t 'ough the walls of the kettle 'at different polnts for inlet to the difi'erentbelts or zones, and outlet therefor, whereby diiferent fluids can'be applied at the same time in difl'er'ent belts or zones. 3. Ina device for treating liquids,- a'kettures of supply.

tle having solid walls and spirall arranged 85 passage for-fluid withinthe wa ls thereof,

. I divided. into belts having an inlet and outlet lVhen the kettle has been filled with the at-difl:'erent points for the different belts, in 40 combination with fluid supply 'for said inlets.

4. In a device for treatlng li uids, a kettle having solid walls and spira ly arranged passage for fluid within the walls thereof, divided into separate belts having an inlet and outlet. for the passage in each belt, the inletsrespectively enterin the. walls of the kettle at difierentpoints %or the different belts, in combination with fluid supply for the same belt having different tempera- 5. In a device for treating liquids, a ket-l tle having spirally" arranged passage for fluid in. the walls thereof, divided into separate belts havin an outlet for the passage in each belt, in combination with separate inlets to the passages for the different belts and a pluralit 1 of temperatures of supply fluid foreach 0 said inlets. a

6. In a device for treating liquids, a kettle havin spiral paths in its walls for fluid passage, ivided into belts having inlets and outlets for'the passages in the difierent belts, in combination with fluid supply at different temperatures for the inlets and valve means for. cutting out any inlet from any or all y f JOHN GEORGE LEHMAN, 

